Valve



Patented .lune il?, i924.,

LEE ROY SNYDER, OF SACRAMENTO, CALIFORNIA.

VALVE.

Application ined april 27,

. To all whom t may conce/m.'

Be it known that ll, LEE ROY SNYDER, a citizen of the United States ofAmerica, residing at Sacramento, in the county of Sacramento and Stateof California, have invented certain new and useful Improvements inValves, of which the following is a specification.

This invention relates to an improvement in plate valvesV forcompressors or the like with a particular view to cushion the open-l ingaction of the valve ring plates and to so form the cooperating portionof the valve proper as to prevent to a material extent metallic'contactof s aid valve ring plate and valve body in the operation of the valve.v

Valves of this type generally involve valve bodies formed withconcentrically arranged openings normally closed by valves in the formof flat annular members or rings. These valves open under fluid pressureagainst the action of springs carried in the valve body, immediatelyclosing through the action of said springs on relief of pressure.Ordinarily compressors acting at more than two hundred R. P. M.necessarily compela correspondingly rapid action of these valve ringplates, and if the valve body is constructed, as has been heretoforeproposed', to permit the contact of the ring valve with any portion ofthe body during this opening movement, such ring plates are deformed orin any event crystallize and break.

It is the object of the present invention to overcome these defects byforming a valve ring plate receiving channel in the valve body intowhich said ring plate moves in the opening movement of the valve. Thischannel is constructed to fully and completely receive the ring valveplate Without permitting contact of said ring valve plate with the valvebody proper, thereby avoiding the impact referred to. The channelA isfurther formed With a view to providing a channel 'beneath the ringvalve plate into which the fluid passing the valve, ordinarily a gas,may nd its way as the valve is opened, the gas being trapped in thechannel by the opening of the valve and forming a cushion for the rinvalve plate in such opening movement. hus, the ring valve plate 1sprotected against impact and is cushioned in such opening movement byvthe gas accumulating in the channel, with the result that tendency tobreakage of the 1923-. Serial No. 635,047.

valve from limpact is avoided, and furthermore the gas cushion acts inan appreciable degree to render the closing action of the valve morerapid and uniform, the compressing of the gas cushion by the opening ofthe valve reversely assisting the closing of the valve when the pressureis relieved.

The invention also comprehends the interruption of the edge flange ofthe valve The invention is illustrated in the accompanying drawings, inwhich:

Fig. 1 is a plan View of the ylower half or bonnet of the valve, thering valve plates being removed.

Fig. 2 is a vertical section of the valve 75 parts on the line 2-2 ofFig. 1.

The improved valve as illustrated includes a bonnetvor lo-Werportio-n 1,and a cap or upper portion 2, as 1s usual in valves of this type. Thecap is formed with concentrically so arranged inlets 3 terminating inannular flanges 4 forming valve seats. As lillustrated, the valve ispro-vided with two such sets of seats, though it is obvious that one orany desired numberA may be used. The

inlets 3 are closed by annular lat ring-like valve members 5, adapted tocooperate with the seats 4 to cut oill the flow of gas in the absence ofpressure. Under pressure these ring valve plates open by moving from theseats 4 to permit the passage of gas. The parts just described aresubstantially conventional for this type of valve.

The lower half or bonnet is formed in alignment with the` inlets 3 withannular 95 channels 6, these channels directly underlying the ring valveplates, as shown particularly in Fig. 2. Within the channels are formed,at determinate points, depressions 7 to receive coil springs 8, whichdi- 100 rectly engage the ring valve plates and act to normally holdthese valve plates in seated or closed relation in the absence ofpressure.

Heretofore the channels 6 have been of less Width than the similardimension of the ring valve plates, so that in the opening movement. ofthe valve plates, the edge walls of the channels were engaged by saidvalve plates, with a distinct impact, which as stated is determinal tothe continued life and function of the valve plate.

In the present invention these channels 6 valve, to iiow around the'edges of t e valve and fill such channels.` As the valve or valvescontinue their opening\movement, they trap the gas previously enteringthese channels with the result that the valves are cushioned in positionopening movement and the pressure of the gas in the channels resultingfrom this cushioning tends to augment the closing action of the springs8 on the valves, thus rendering the valves more ra id in their closingactlon.

urthermore, the -usual edge {iange 9 about the bonnet and over which,the gas escapes has been heretofore formed as ank uninterrupted member,and thus to some extent has acted to ret-ard the escape of the as. Inthe present invention, this channel 1s cutaway at determinate intervals,provid+ z ing free openings 10, through which the gas 'valves open, thesaid channels forming gas135 chambers to receive a 'gas charge in theinf"` itial opening' of the valve for cushioning" the valve movement.

2. A valve having annular valve plates adapted to open under pressure,said valve being formed with channels into which the valves open, thesaid channels forming gas chambers lto receive a gas charge in theinitial o ening of the valve for cushionin the va ve movement, andsprings arrange in-said channels to normally maintain the valves inclosed position.

3.v A plate valve having annular channels to receive rin valves in theopening of the latter,l said c annels having a width exceeding that ofthe ring valves and. a vdepth greater than the opening movement of thevalves, whereby to avoid valve plate impact in such opening valvemovement.

-In testimony whereof I aiix my signature.

LEE ROY SNYDER. [1.. s]

